public/Rename-AzToolsContext.ps1

function Rename-AzToolsContext {
    <#
    .SYNOPSIS
        Rename an existing Azure context
    .DESCRIPTION
        Rename a selected Azure context for easier referencing
    .PARAMETER (none)
        This function requires no input
    .EXAMPLE
        Rename-AzToolsContext
        Displays gridview to select context to rename, then prompts for new name to apply
    #>

    [CmdletBinding()]
    param ()
    Write-Host "Current Az Context: $(Get-AzContext | Select-Object -ExpandProperty Name)" -ForegroundColor Cyan
    $ctx = Get-AzContext -ListAvailable | Sort-Object Name | Out-GridView -Title "Select Profile to Rename" -OutputMode Single
    $newname = Read-Host -Prompt "New Name"
    if (![string]::IsNullOrWhiteSpace($newname)) {
        Rename-AzContext -InputObject $ctx -TargetName $newname -Scope CurrentUser
        Write-Host "Context renamed to: $($newname)" -ForegroundColor Yellow
    }
}